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Design >> RF Design >> How to balance I/Q loading for CML divider?
https://designers-guide.org/forum/YaBB.pl?num=1235699494

Message started by jlee on Feb 26^th, 2009, 5:51pm

Title: How to balance I/Q loading for CML divider?
Post by jlee on Feb 26^th, 2009, 5:51pm

Hi guys,

As the title, a CML divider(DIV-1) is used to generate a group of I/Q differential signals (In, Ip, Qn, Qp) for the following mixer. Since there is another CML divider(DIV-2) following this divider(DIV-1), which means a group of differential signals will be fed into DIV-2, the I/Q loading for DIV-1 will not be balance.

Is there any suggestion or paper as reference to solve this problem?

Thanks in advance!

Regards :D

Title: Re: How to balance I/Q loading for CML divider?
Post by mydreamhouse on Feb 27^th, 2009, 9:19am

Capacitor compensation

Title: Re: How to balance I/Q loading for CML divider?
Post by ywguo on Mar 4^th, 2009, 8:01pm

jlee,

Now that one pair of differential signals goes to DIV-2, put a dummy DIV-2 for the other pair of differential signals.

Yawei